nov 10, 1070 - Great Serpent Mound

Description:

1070 CEEarthwork/effigy moundAdams County, Southern OhioThe head of the serpent aligns with the summer solstice sunset, and tail points to the winter solstice sunrise. It has been suggested that the curves in the body of the snake parallel lunar phases, or alternatively align with the two solstices and two equinoxes.